Source : Webster's Revised Unabridged Dictionary (1913)

Rentier \Ren`tier"\ (r?N`ty?"), n. [F. See 5th {Rent}.]
   One who has a fixed income, as from lands, stocks, or the
   like.

Source : WordNet®

rentier
     n : someone whose income is from property rents or bond interest
         and other investments